TR250-145U Tyco Electronics, TR250-145U Datasheet - Page 22

• Manufacturer Part Number: TR250-145U
• Description: POLYSWITCH 0.145A HOLD UNENCAPS
• Manufacturer: Tyco Electronics
• Series: PolySwitch®r

Specifications of TR250-145U

• R Min/max: 3.500 ~ 6.500 Ohm
• Voltage - Max: 60V
• Time To Trip: 2s
• Current - Hold (ih) (max): 145mA
• Current - Trip (it): 290mA
• Current - Max: 3A
• Package / Case: Radial
• Holding Current: 0.145A
• Tripping Current: 0.29A
• Initial Resistance Max: 6.5ohm
• Initial Resistance Min: 3.5ohm
• Resistance R1: 12ohm
• Peak Reflow Compatible (260 C): No
• Fuse Terminals: Radial Leaded
• Thermistor Type: PTC
• Lead Free Status / RoHS Status: Contains lead / RoHS non-compliant
• Other names: TR145U

4
Solder Reflow
• Recommended reflow methods:
• Surface-mount devices are not
• Recommended maximum paste
• Devices can be cleaned using
Rework
• If a device is removed from the
• If reflow temperatures exceed recommended profile, devices may not meet the performance requirements.
• Leaded devices are not designed to be compatible with reflow manufacturing operations.
• Recommended solder/temperature exposure for leaded devices is designated in the environmental/
322
Solder Reflow and Rework Recommendations for Telecommunications and Surface-Mount Devices
IR, vapor phase oven, hot air
oven.
designed to be wave soldered to
the bottom side of the board
(with the exception of
miniSMDC014).
thickness of 0.25mm (0.010 in).
standard industry methods and
solvents.
board, it should be discarded
and replaced with a new device.
physical tables for the product family. Exposure to temperatures or duration at temperature in excess of
these values may lead to device not meeting performance requirements.
PolySwitch Telecommunications and Networking Resettable Devices
CAUTION:
300
250
200
100
150
50
0
Preheating
30 to 90
Figure T21
Soldering
10 to 20
Time(s)
Cooling
120
Raychem Circuit Protection